AnnouncementService.OnBeginOnlineAnnouncement(DiscoveryMessageSequence, EndpointDiscoveryMetadata, AsyncCallback, Object) 方法

定义

开始处理传入的联机公告 (Hello) 消息。Starts the processing of incoming online announcement (Hello) messages.

protected:
 virtual IAsyncResult ^ OnBeginOnlineAnnouncement(System::ServiceModel::Discovery::DiscoveryMessageSequence ^ messageSequence, System::ServiceModel::Discovery::EndpointDiscoveryMetadata ^ endpointDiscoveryMetadata, AsyncCallback ^ callback, System::Object ^ state);
protected virtual IAsyncResult OnBeginOnlineAnnouncement (System.ServiceModel.Discovery.DiscoveryMessageSequence messageSequence, System.ServiceModel.Discovery.EndpointDiscoveryMetadata endpointDiscoveryMetadata, AsyncCallback callback, object state);
abstract member OnBeginOnlineAnnouncement : System.ServiceModel.Discovery.DiscoveryMessageSequence * System.ServiceModel.Discovery.EndpointDiscoveryMetadata * AsyncCallback * obj -> IAsyncResult
override this.OnBeginOnlineAnnouncement : System.ServiceModel.Discovery.DiscoveryMessageSequence * System.ServiceModel.Discovery.EndpointDiscoveryMetadata * AsyncCallback * obj -> IAsyncResult
Protected Overridable Function OnBeginOnlineAnnouncement (messageSequence As DiscoveryMessageSequence, endpointDiscoveryMetadata As EndpointDiscoveryMetadata, callback As AsyncCallback, state As Object) As IAsyncResult

参数

messageSequence
DiscoveryMessageSequence

此消息在当前通知序列中的位置。The position of this message in the sequence for the current notification.

endpointDiscoveryMetadata
EndpointDiscoveryMetadata

一个对象,该对象提供终结点元数据,例如,范围、侦听 URI、协定名称和终结点地址。An object that provides endpoint metadata, for example scopes, listen URI, contract names, and endpoint address.

callback
AsyncCallback

将在完成异步操作时调用的方法。The method to call when the asynchronous operation is complete.

state
Object

基础结构定义的状态数据。Infrastructure-defined state data.

返回

IAsyncResult

挂起的异步请求的状态。The status of the pending asynchronous request.

注解

AnnouncementService 中继承以实现自定义公告侦听器服务的类必须重写此方法,并开始处理传入的 Hello 消息。Classes that inherit from AnnouncementService to implement a custom announcement listener service must override this method and begin to process incoming Hello messages.

适用于